# Relationship history for MSHA mine 0404742

Current hierarchy: **Hernandez Benny → Hernandez Trucking → Railroad Canyon D G Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Hernandez Trucking → Railroad Canyon D G Pit; 1985-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hernandez Benny → Railroad Canyon D G Pit; 1985-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hernandez Benny → Hernandez Trucking; 1985-05-01 to current/open; source msha-controller-operator-history